Gravely 911530 - Pro 21 SCH - Manual (Page 11)

GB - 11
Engine/blade control feature on mower stops
engine and blade within 3 seconds whenever
operator releases handlebar. Check this
feature frequently. If feature fails to operate,
disconnect spark plug wire and adjust or have
it repaired before using unit.
Handlebar
Adjust handlebar to a safe and comfortable
height. See
Handlebar Height on page 16.
Recoil Starter Handle
When pulled, handle will turn engine over.
CUTTING HEIGHT ADJUSTMENT
To change cutting height, move cutting height
levers one notch at a time on each wheel to
set desired height (Figure 5).
NOTE: Each wheel on mower must be set at
the same height for a level cut.
CONTROLS
Primer Bulb
Push the primer bulb in to add fuel for easier
engine start.
Throttle
The throttle controls the engine
speed and chokes engine for
starting.
1.Start - Push lever all the way
forward.
2.Fast.
3.Slow - Pull lever all the way
rearward.
DANGER: Avoid injury from rotating
blade.
ALWAYS shut off engine before
adjusting cutting height.
CAUTION: Both rear wheels must
be set at same height or traction
drive may not work properly.
Cutting Height Settings Chart
Notch Cut grass length
LOW 1" (25 mm)
2 1-3/8" (35 mm)
3 1-3/4" (45 mm)
4 2-1/4" (57 mm)
5 2-3/4" (70 mm)
HIGH 3-1/4" (83 mm)
STOP START and RUN
OM1230
High
High
Low
Low
Figure 5
1. Cutting Height Lever
1
1
OM0165
Front
Rear
1
2
3
OL2074